JP2570910Y2 - Water purification cartridge - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge for water purification, and more particularly to a cartridge for water purification using two kinds of filtration materials.

[0002]

2. Description of the Related Art Tap water used for drinking contains about 1 ppm of chlorine for sterilization. This chlorine presents a person drinking tap water with discomfort due to chlorine odor. In addition, during the drought period of the water source, a green odor, which cannot be removed by the ordinary water purification treatment at the water purification plant, remains in the tap water, giving more discomfort than chlorine.

[0003] In order to remove such chlorine and blue odors, for example, water purification using a water purification filter using an activated carbon fiber layer and hollow fibers as disclosed in Japanese Utility Model Publication No. 3-51032 has been proposed. Vessels have been supplied and are becoming more widespread.

[0004]

The water purifying cartridge of a water purifier used in ordinary households is, for example, a combination of activated carbon and hollow fibers, which removes chlorine and blue odors with activated carbon. Suspended substances are removed by hollow fibers.

[0005] Such home water purifiers must have their cartridges compact so that they can be mounted directly on a tap. Therefore, various measures have been taken such as disposing the hollow fiber on the center side and disposing activated carbon on the outer peripheral side.

If a filter layer made of, for example, activated carbon fiber is provided on the outer peripheral surface of the case as the above-mentioned activated carbon and hollow fibers are incorporated inside the case, the cartridge for water purification becomes compact. However, on the outer peripheral surface of the case, an inflow port for raw water to flow in is formed,
In particular, when raw water flows into the case through the gaps at both ends of the activated carbon fiber layer without passing through the activated carbon fiber layer, the filtration by the activated carbon fiber layer is not performed.

In particular, in the case where flanges are formed at both ends in the axial direction of the case, and an activated carbon fiber layer is formed between the flanges at both ends and on the outer peripheral surface of the case, the flange and the end surface of the activated carbon fiber layer are formed. Water may flow between the layers, which may prevent filtration by the activated carbon fiber layer.

The present invention has been made in view of such problems, and has as its object to provide a water purification cartridge in which raw water always passes through a filter material on a case. .

[0009]

According to a first aspect of the present invention, a first filtering material is disposed in a cylindrical case having an open end, and a plurality of inlets are provided on an outer peripheral surface of the case. And a sheet-like second filtering material wound around the outer peripheral surface of the case where the inflow port is formed. The case has one end opened and the other end closed. Is stored in a closed outer cylinder, a gap between the outer peripheral surface of the case and the inner peripheral surface of the outer cylinder is a raw water passage, and raw water introduced from an opening at one end of the outer cylinder is Permeate through the second filter material on the outer peripheral surface of the case, further permeate through the first filter material in the case, and are discharged from the opening at one end of the case. Do not form an inflow port near both ends in the axial direction of the case, on the outer peripheral surface of the case The filtered second filter material is provided at a portion of the outer peripheral surface of the case where the inflow port is not formed at least a distance corresponding to the thickness of the second filter material from both axial ends thereof. The present invention relates to a water purification cartridge characterized by being brought into close contact.

In a second aspect of the present invention, hollow fibers are arranged in a U-shaped state in a cylindrical case having an open end, and the open ends of both ends of the hollow fibers are opened in the case. The case is fixed by an encapsulant in a state of facing, and one end of the case is closed by the encapsulant, and the case is housed in an outer cylinder having one end opened and the other end closed, A gap between the outer peripheral side and the inner peripheral surface of the outer cylinder is a raw water passage, and an activated carbon fiber layer formed by winding an activated carbon fiber sheet is provided on the outer peripheral surface of the case. Flows through the activated carbon fiber layer in the thickness direction thereof, a plurality of inflow ports are formed on the outer peripheral surface of the case, and passes through the activated carbon fiber layer through the inflow port into the case. The raw water to be introduced The penetrate into the hollow fibers, so as to be discharged through the open end of both ends of the hollow fibers had,
In addition, an inflow port is not formed near both ends in the axial direction of the outer peripheral surface of the case, and the activated carbon fiber layer provided on the outer peripheral surface of the case is at least the activated carbon fiber layer from both ends in the axial direction. The present invention relates to a water purification cartridge, which is in close contact with a portion of the outer peripheral surface of the case where an inflow port is not formed, by a distance corresponding to a thickness of a fiber layer.

In a third aspect of the present invention, hollow fibers are arranged in a U-shape in a cylindrical case having an open end, and the open ends of both ends of the hollow fibers are opened in the case. The case is fixed by an encapsulant in a state of facing, and one end of the case is closed by the encapsulant, and the case is housed in an outer cylinder having one end opened and the other end closed, A gap between the outer peripheral side and the inner peripheral surface of the outer cylinder is a raw water passage, and an activated carbon fiber layer formed by winding an activated carbon fiber sheet is provided on the outer peripheral surface of the case. Flows through the activated carbon fiber layer in the thickness direction thereof, a plurality of inflow ports are formed on the outer peripheral surface of the case, and passes through the activated carbon fiber layer through the inflow port into the case. The raw water to be introduced The penetrate into the hollow fibers, so as to be discharged through the open end of both ends of the hollow fibers had,
In addition, a recess is formed on the outer peripheral surface of the case except that an inflow port is not formed in an area at a distance corresponding to at least the thickness of the activated carbon fiber layer from both ends in the axial direction of the case. Forming and forming an inflow port in the recess, the outer surface of the case where the recess is not formed, and at both axial ends, the activated carbon fiber layer is in close contact with the outer surface, In contrast, the present invention relates to a cartridge for water purification, wherein a coarse nonwoven fabric is disposed in the recess, and the activated carbon fiber layer is disposed on the coarse nonwoven fabric.

[0012]

According to the first aspect of the present invention, the raw water passes through the gap between the case and the inner peripheral surface of the outer cylinder and permeates through the second filter material on the outer peripheral surface of the case, and the outer peripheral surface of the case. And enters the case through the inlet formed in the case, passes through the first filter medium in the case, and is discharged from the opening of the case. Even if the raw water passes through both ends of the second filter material disposed on the outer peripheral surface of the case, the raw water remains on the outer peripheral surface of the case at least a distance corresponding to the thickness of the second filter material. It will pass through the second filter material which is adhered.

According to the second invention, the raw water permeates the activated carbon fiber layer on the outer peripheral surface of the case through the gap between the case and the inner peripheral surface of the outer cylinder, and is formed on the outer peripheral surface of the case. It enters into the case through the inflow port, passes through the wall surface of the hollow fiber in the case, and is discharged from the opening at one end enclosed by the resin of the case through the openings at both ends of the hollow fiber.
And even if raw water passes through both ends of the activated carbon fiber layer arranged on the outer peripheral surface of the case, this raw water is adhered to the outer peripheral surface of the case at least a distance corresponding to the thickness of the activated carbon fiber layer. It will pass through the activated carbon fiber layer.

According to the third invention, the raw water permeates the activated carbon fiber layer on the outer peripheral surface of the case through the gap between the case and the inner peripheral surface of the outer cylinder, and is formed on the outer peripheral surface of the case. It enters into the case through the inflow port, passes through the wall surface of the hollow fiber in the case, and is discharged from the opening at one end enclosed by the resin of the case through the openings at both ends of the hollow fiber.

A concave portion is formed on the outer peripheral surface of the case except for both ends thereof, and a coarse nonwoven fabric is arranged in the concave portion. A substantial gap is formed between the case and the outer peripheral surface of the case. Therefore, the raw water permeates the inside of the activated carbon fiber layer also in portions other than the inlet of the case. Even if raw water passes through both ends of the activated carbon fiber layer wound on the outer peripheral surface of the case, the raw water is adhered to the outer peripheral surface of the case at least a distance corresponding to the thickness of the activated carbon fiber layer. Permeate through the activated carbon fiber layer, and at this time, filtration is performed by the activated carbon fiber layer.

[0016]

1 to 4 show a water purifier using a water purifying cartridge according to an embodiment of the present invention. The water purifier includes a frame 10 having a valve chamber. An adapter ring 12 having a connection port 11 is provided at a connection portion of the frame 10 connected to a water tap. The adapter ring 12 is adapted to be tightened by a holding nut 13 as shown in FIG.

A packing 14 is provided inside the presser nut 13, and the packing 14 is pressed against the tip of a water tap. A rotary valve 15 is provided inside the packing 14. The rotary valve 15 includes a support shaft 16 as shown in FIG.
A switching knob 17 is attached to the tip of the support shaft 16.

The rotary valve 15 is provided with a discharge port 20 on its outer peripheral side, and a lower passage 21 is formed vertically below the rotary valve 15. A raw water discharge port 22 is provided at the outlet side portion of the lower passage 21.
Is provided. A shower connection passage 28 is provided on the outer peripheral side of the lower passage 21, and a shower hole 29 is formed below the shower connection passage 28.

The housing of the rotary valve 15 is
It is connected to the discharge pipe 23 shown in FIG. The distal end of the discharge pipe 23 communicates with the raw water passage 24. The raw water passage 24 communicates with an annular passage 25, and the annular passage 25 communicates with a passage hole 26. The passage hole 26 is connected to a connection passage 27 with the cartridge 30.

The cartridge 30 detachably mounted on the upper part of the frame 10 in FIG. 1 has an outer cylinder 31 whose tip is closed. The case 32 is accommodated in the outer cylinder 31.

As shown in FIGS. 5 to 8, the case 32 has flanges 33 and 34 at both ends thereof, and an activated carbon fiber layer 35 and a nonwoven fabric 36 are alternately wound around the outer periphery of the case 32. (See FIG. 6). The activated carbon fiber layer 35 is made of felt of activated carbon fibers. The activated carbon fiber layer 35 is made of carbon fibers obtained by activating a polyacrylonitrile-based, cellulose-based, pitch-based, phenol-based, or other fiber as a raw material by an ordinary method. Such activated carbon fibers are effective for adsorbing and removing organic substances, disinfectant components, and the like in raw water, and have a function of adsorbing and removing chlorine and blue water in raw water.

As shown in FIGS. 5, 7, and 8, a slit-shaped inlet 40 is formed in the outer periphery of the case 32 of the cartridge 30. As shown in FIGS. 5 and 7, countless hollow fibers 41 are accommodated in the case 32 in a state of being bent in a U-shape. It is opened so as to face the portion and is fixed by the sealing resin 42. The hollow fiber 41 has countless fine pores of 0.01 to 0.1 μm formed on its wall surface to remove turbidity components and bacteria in raw water.

As such a hollow fiber, for example, a fiber material made of a high molecular polymer such as cellulose, polyolefin, polysulfone, and polyvinyl alcohol may be used.

In addition, the case 3
The opening at one end of 2 is closed. An O-ring 43 is mounted on the outer peripheral side of one end of the case 32 sealed with the resin 42, and the O-ring 43 seals at the time of connection (see FIG. 1).

A water purification discharge passage 44 is provided at the center of the cartridge 30 in which the case 32 is housed, as shown in FIG. As shown in FIG.
When it is connected to zero, it is connected to the purified water discharge pipe 45. A float 4 is provided at the tip of the clean water discharge pipe 45.
6 is housed and is pressed upward by a spring 47 in FIG. The distal end side of the purified water discharge pipe 45 provided with the float 46 is bent in an L-shape as shown in FIG. 3 and constitutes a purified water discharge port 48.

Next, the operation of the water purifier having the above configuration will be described. By connecting the connection port 11 of the frame 10 to a water tap by the adapter ring 12 and the holding nut 13, the water purifier can be attached to the water tap. When the switching knob 17 is rotated to the upper position in FIG. 4 in such a state, the raw water from the faucet taps the opening 18 of the rotary valve 15,
Raw water discharge port 22 through discharge port 20 and lower passage 21
Will be discharged directly from Therefore, in this case, the tap water is taken out of the raw water discharge port 22 of the case 10 as it is without any purification.

Next, when the switching knob 17 is turned to the oblique position shown by the solid line in FIG. 4, the discharge port 20 of the rotary valve 15 is connected to the shower connection passage 2 outside the lower passage 21.
8 will be connected. Therefore, the tap water entering from the upper part is the opening 18 of the rotary valve 15 and the outlet 2
The shower unit 29 is discharged downward from the shower hole 29 of the shower unit through the shower connection passage 28 and the shower connection passage 28. That is, in this case, the tap water is discharged in a shower shape by the shower unit without being purified.

Next, when the switching knob 17 is switched to the horizontal position shown by a chain line in FIG. 4, the opening 18 of the rotary valve 15 is connected to the discharge pipe 23 shown in FIG. Therefore, the raw water from the tap is shown in FIG. 7 through the opening 18 of the rotary valve 15, the discharge pipe 23, the raw water passage 24, the annular passage 25, the passage hole 26, and the connection passage 27, as shown by arrows in FIG. It is introduced into the gap between the cartridge 30 and the case 32 on the outer peripheral side. After this, the raw water passes through the activated carbon fiber layer 35 wound around the outer peripheral surface of the case 32 in the thickness direction thereof, and is introduced into the case through the inlet 40 of the case 32.

Since the hollow fibers 41 are arranged in a U-shape in the case 32, the raw water introduced into the case 32 passes through the wall surfaces of the hollow fibers 41, and Break into Then, the air is discharged through the openings at both ends of the hollow fiber and fixed by the encapsulating resin 42, whereby the hollow fiber is purified.

The purified water thus obtained is discharged through the purified water discharge passage 44, the purified water discharge pipe 45, and the purified water discharge port 48. That is, purified water purified in the cartridge 30 of the water purifier is obtained through the purified water outlet 48. And the flow rate at this time is
7 is visually detected from the position of the float 46 which is moved in opposition to the float 7.

In the cartridge 30 of the water purifier for purifying tap water in this way, the inlet 4 of the case 32
0 has the smallest aperture ratio at the portion where the opening of the case 32 is provided in the axial direction of the case 32 as shown in FIGS. 7 and 8, and has the largest aperture ratio at the opposite side. I have.

As described above, the cartridge 30 whose opening ratio is increased toward the back as viewed from the side where water flows in is used, and the inflow port 40 is rectangular and has a length of 20 mm and is constant. Yes, the width is variable so as to be sequentially enlarged from 1 to 5 mm. This carridge 3
In the case of 0, the flow rate is 2 to 5 l / min, and the thickness of the activated carbon fiber layer 35 wound around the outer peripheral portion between the flanges 33 and 34 of the case 32 is 7 mm.

Moreover, the outer peripheral surface of the case 32 on which the activated carbon fiber layer 35 is wound and on which the inflow port 40 is formed is particularly, as shown in FIG. Distance L longer than thickness D of carbon fiber layer 35
Only the inlet 40 does not exist, and the activated carbon fiber layer 35 is brought into close contact with the outer peripheral surface of the case 32.

The activated carbon fiber layer 35 and the nonwoven fabric 36 are wound on the outer peripheral surface of the case 32 in a state of being laminated on each other. The ends of the windings are bonded and fixed in the axial direction using a hot melt adhesive. Instead of the adhesive, the end may be fixed by a belt, or a net may be wound from the outside to form the activated carbon fiber layer 35 and the nonwoven fabric 3 on the outer peripheral surface of the case 32.
6 may be fixed.

Therefore, even if the raw water passes through the end face of the activated carbon fiber layer 35 and the joining surface with the flanges 33 and 34, when the raw water further flows in the axial direction, the section of the distance L is at least the activated carbon. It must pass through the fiber layer 35. That is, it passes through the activated carbon fiber layer 35 for a distance L longer than the distance D corresponding to the thickness of the activated carbon fiber layer 35. At this time, the activated carbon fiber layer 35
As a result, purification is performed, and chlorine odor and blue odor are removed. In this example,
L is 8 mm and D is 7 mm.

FIG. 10 shows a modification. In this modification, a concave portion 51 is formed on the outer peripheral surface of the case 32 around which the activated carbon fiber layer 35 is wound.
The nonwoven fabric 52 is arranged in the recess 51. By forming the recess 51 such that the nonwoven fabric 52 is interposed in the middle, the active carbon fiber layer 35 does not come into direct contact with the outer peripheral surface of the case 32. The activated carbon fiber layer 35 can be effectively used in a region other than the portion where the active carbon fiber layer 35 is provided.

Moreover, in the case 32 in which the recess 51 is formed on the outer peripheral surface as described above, the activated carbon fiber layer 35 is in direct contact with the outer peripheral surface of the case 32 only for a distance of L in the axial direction from the flanges 33 and 34. The position of the terminal end of the recess 51 is shifted from the flanges 33 and 34 by L. Therefore, even with such a configuration, the flange 33,
Even if the raw water permeates through the gap between 34 and the end of the activated carbon fiber layer 35, this raw water permeates at least the length L of the activated carbon fiber layer 35, and the Raw water that has passed through the gap between the active carbon fiber layer 35 and the active carbon fiber layer 35 can be reliably purified by the active carbon fiber layer 35.

Although the present invention has been described with reference to an embodiment shown in the drawings, the present invention is not limited to the above-described embodiment.
Various modifications are possible based on the technical concept of the present invention.
For example, in the above-described embodiment, the hollow fibers are arranged in the case 32 and the activated carbon fiber layer is used on the outer peripheral surface of the case 32. However, the type and combination of the filtering material are variously changed. It is possible to use various kinds of filtration materials such as coral sand, ion exchange membrane, granular activated carbon, molded activated carbon and the like, and these may be used in combination with the hollow fiber or the activated carbon fiber layer. Good.

[0039]

According to the first aspect of the present invention, the first filtering material is disposed in a cylindrical case having an open end, and a plurality of inlets are formed on the outer peripheral surface of the case. In addition, a sheet-shaped second filtering material is wound around the outer peripheral surface of the case where the inflow port is formed, and the case is open at one end and closed at the other end. The raw water is accommodated in the cylinder, a gap between the outer peripheral surface of the case and the inner peripheral surface of the outer cylinder is used as a raw water passage, and the raw water introduced from the opening at one end of the outer cylinder is the second raw water on the outer peripheral surface of the case. And through the first filter material in the case, is discharged from the opening at one end of the case, and has an inlet formed in the vicinity of both axial ends of the outer peripheral surface of the case. So that the second filter material provided on the outer peripheral surface of the case is less than two axial ends. But also be adhered to by a distance corresponding to the thickness the outer peripheral surface on the inlet of the case is not formed part of the second filter media.

Therefore, according to this structure, the second filter medium is preferably provided at the inlet on the outer peripheral surface of the case by at least a distance corresponding to the thickness of the second filter medium from both ends in the axial direction. And the raw water passing through the gaps at both axial ends of the second filter medium is removed at least by a distance corresponding to the thickness of the second filter medium. 2 to prevent the introduction of raw water into the case through the inlet of the case without sufficient filtration by the second filter medium. Will be possible.

According to a second aspect of the present invention, hollow fibers are arranged in a U-shape in a cylindrical case having an open end, and the open ends of both ends of the hollow fiber are formed in the case. The case is fixed by the encapsulant facing the opening, and one end of the case is closed by the encapsulant. The case is housed in an outer cylinder having one end opened and the other end closed, and the outer peripheral side of the case. The gap between the inner peripheral surface of the outer cylinder is a raw water passage, and an activated carbon fiber layer formed by winding an activated carbon fiber sheet is provided on the outer peripheral surface of the case. The layer flows through the layer in the thickness direction, and a plurality of inlets are formed on the outer peripheral surface of the case, and the raw water permeating the activated carbon fiber layer and introduced into the case through the inlet is a wall surface of the hollow fiber. Through the hollow fiber into the hollow fiber, So that the inflow ports are not formed near both ends in the axial direction of the outer peripheral surface of the case, and the activated carbon fiber layer provided on the outer peripheral surface of the case is in the axial direction. At least at a distance corresponding to the thickness of the activated carbon fiber layer from both ends of the case to the portion of the outer peripheral surface of the case where the inflow port is not formed.

Therefore, according to such a configuration, the activated carbon fiber layer disposed on the outer peripheral surface of the case is preferably arranged such that at least a distance corresponding to the thickness of the activated carbon fiber layer from both ends in the axial direction is equal to the outer periphery of the case. Raw water passing through the gaps at both ends in the axial direction of the activated carbon fiber layer will be in close contact with the portion of the surface where the inflow port is not formed, and at least a distance corresponding to the thickness of this activated carbon fiber layer It will pass through the activated carbon fiber layer, thereby preventing the introduction of raw water into it through the inlet of the case without sufficient filtration by the activated carbon fiber layer. .

According to a third aspect of the present invention, hollow fibers are arranged in a U-shape in a cylindrical case having an open end, and the open ends of both ends of the hollow fiber face the opening of the case. While being fixed by the encapsulant in a state in which the case is closed, one end of the case is closed by the encapsulant, and the case is housed in an outer cylinder having one end opened and the other end closed. The gap between the inner peripheral surface of the outer cylinder is a raw water passage, and an activated carbon fiber layer formed by winding an activated carbon sheet is provided on the outer peripheral surface of the case. The raw water flows so as to penetrate in the vertical direction, a plurality of inlets are formed on the outer peripheral surface of the case, and the raw water passing through the activated carbon fiber layer and introduced into the case through the inlet passes through the wall surface of the hollow fiber. Into the hollow fiber, and open ends of both ends of the hollow fiber And at the outer peripheral surface of the case, at least at a distance from both ends in the axial direction corresponding to the thickness of the activated carbon fiber layer, without leaving an inflow port. A concave portion is formed on the surface and an inlet is formed in the concave portion. At the outer peripheral surface of the case where the concave portion is not formed, at both ends in the axial direction, the activated carbon fiber layer adheres to the outer peripheral surface. On the other hand, a coarse nonwoven fabric is arranged in the recess, and the second activated carbon fiber layer is arranged on the coarse nonwoven fabric.

Therefore, according to such a configuration, the inflow port on the outer peripheral surface of the case is not formed at least at a distance corresponding to the thickness of the activated carbon fiber layer from both ends in the axial direction of the activated carbon fiber layer. The raw water that passes through the gaps at both ends of the activated carbon fiber layer will pass through the activated carbon fiber layer by at least a length corresponding to the thickness of the activated carbon fiber layer. Thus, the filtration by the activated carbon fiber layer is sufficiently performed. In addition, since the coarse non-woven fabric is interposed between the activated carbon fiber layer and the outer peripheral surface of the case at the intermediate portion in the axial direction of the case, the active carbon fiber is formed even in the portion where the inlet of the case is not formed. The raw water permeates through the fiber layer, so that filtration can be performed by effectively utilizing the entire surface of the activated carbon fiber layer.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the entire structure of a water purifier.

FIG. 2 is a longitudinal sectional view showing the entire structure of the water purifier.

FIG. 3 is a vertical sectional view showing a water purifier outlet.

FIG. 4 is a side view showing the appearance of the case.

FIG. 5 is a sectional view of the cartridge.

FIG. 6 is an external perspective view of a case in which an activated carbon fiber layer and a nonwoven fabric are alternately wound.

FIG. 7 is a vertical sectional view of the cartridge.

FIG. 8 is an external perspective view of a case.

FIG. 9 is a longitudinal sectional view of a main part of the case. .

FIG. 10 is a longitudinal sectional view showing a case of a modification.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Frame 11 Connection port 12 Adapter ring 13 Holding nut 14 Packing 15 Rotary valve 16 Support shaft 17 Switching knob 18 Opening 20 Drain 21 Lower passage 22 Raw water discharge 23 Drain pipe 24 Raw water passage 25 Annular passage 26 Through hole 27 Connection passage 28 Shower connection passage 29 Shower hole 30 Cartridge 31 Outer cylinder 32 Case 33, 34 Flange 35 Activated carbon fiber layer 36 Non-woven fabric 40 Inlet 41 Hollow fiber 42 Encapsulating resin 43 O-ring 44 Purified water discharge passage 45 Purified water discharge pipe 46 Float 47 Spring 48 Clean water outlet 51 Recess 52 Non-woven fabric 53 Hot melt adhesive

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toyohiko Takatsuki 1-20-5 Tenma, Kita-ku, Osaka-shi, Osaka Inside Zojirushi Mahobin Co., Ltd. (72) Masahiro Yoshida 1-1-20 Tenma, Kita-ku, Osaka, Osaka No. 5 Inside Zojirushi Mahobin Co., Ltd. (56) References JP-A-1-135558 (JP, A) JP-A-4-126799 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] 1. A first filtering material is disposed in a cylindrical case having an open end, and a plurality of inlets are formed on an outer peripheral surface of the case, and the inlets are formed. A sheet-like second filtering material is wound around the outer peripheral surface of the case, and the case is housed in an outer cylinder having one end opened and the other end closed. The gap between the outer peripheral surface of the case and the inner peripheral surface of the outer cylinder is a raw water passage, and the raw water introduced from an opening at one end of the outer cylinder is the second water on the outer peripheral surface of the case. Through the first filter material in the case, is discharged from the opening at one end of the case, and flows near both ends in the axial direction of the outer peripheral surface of the case. The second filter provided on the outer peripheral surface of the case is prevented from forming an inlet. The material is adhered to a portion of the outer peripheral surface of the case where an inflow port is not formed at least from a distance corresponding to a thickness of the second filtration material from both ends in the axial direction. cartridge. 2. A state in which hollow fibers are arranged in a U-shaped state in a cylindrical case having an open end, and open ends of both ends of the hollow fibers face the opening of the case. And one end of the case is closed by the enclosing material, and the case is housed in an outer cylinder having one end opened and the other end closed, and is provided on the outer peripheral side of the case. A gap between the inner peripheral surface of the outer cylinder is a raw water passage, and an activated carbon fiber layer formed by winding an activated carbon fiber sheet is provided on the outer peripheral surface of the case. Raw water flowing through the fiber layer in the thickness direction thereof, a plurality of inlets are formed on the outer peripheral surface of the case, and the raw water is transmitted through the activated carbon fiber layer and introduced into the case through the inlet. Passes through the wall surface of the hollow fiber and In order to enter into the hollow fiber and to be discharged through the open ends of both ends of the hollow fiber, and to form no inflow ports near both ends in the axial direction of the outer peripheral surface of the case, the outer peripheral surface of the case The activated carbon fiber layer provided thereon is in close contact with a portion where the inflow port is not formed on the outer peripheral surface of the case by a distance corresponding to at least the thickness of the activated carbon fiber layer from both ends in the axial direction. A cartridge for water purification. 3. A state in which hollow fibers are arranged in a U-shaped state in a cylindrical case having an open end, and the open ends of both ends of the hollow fibers face the opening of the case. And one end of the case is closed by the enclosing material, and the case is housed in an outer cylinder having one end opened and the other end closed, and is provided on the outer peripheral side of the case. A gap between the inner peripheral surface of the outer cylinder is a raw water passage, and an activated carbon fiber layer formed by winding an activated carbon fiber sheet is provided on the outer peripheral surface of the case. Raw water flowing through the fiber layer in the thickness direction thereof, a plurality of inlets are formed on the outer peripheral surface of the case, and the raw water is transmitted through the activated carbon fiber layer and introduced into the case through the inlet. Passes through the wall surface of the hollow fiber and It invades into the hollow fiber and is discharged through the open ends of both ends of the hollow fiber. Further, it corresponds to at least the thickness of the activated carbon fiber layer from both ends in the axial direction on the outer peripheral surface of the case. A recess is formed on the outer peripheral surface while an inflow port is not formed in the region of the distance, and an inflow port is formed in the recess, and the outer peripheral surface of the case where the recess is not formed. At both ends in the axial direction, the activated carbon fiber layer is in close contact with the outer peripheral surface, whereas a coarse nonwoven fabric is disposed in the recess, and the activated carbon fiber layer is disposed on the coarse nonwoven fabric. A cartridge for water purification, characterized in that: